Importer issue

[alex-eri]

    connect(PythonQt::self(), SIGNAL(pythonStdErr(const QString&)), this, SLOT(log(const QString&)));
    PythonQt::self()->setImporter(NULL);
    Q_ASSERT(!mainModule.isNull());
    mainModule.evalScript(QString("import sys,site\n"));
    mainModule.evalScript("for s in site.getsitepackages(): sys.path.append(s)\n");
    mainModule.evalScript("sys.path.append(site.getusersitepackages())\n");
    mainModule.evalScript("sys.path.append(':cashcode')\n");
//    mainModule.evalScript("import serial\n");
    mainModule.evalScript("import ccnet\n");

On importing serial from module in qrc

ERROR:root:<module 'site' from '/usr/lib/python3.8/site.py'>
ERROR:root:['/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/usr/lib/python3.8/site-packages', '/home/eri/.local/lib/python3.8/site-packages', ':cashcode']

Traceback (most recent call last):
  File \"/usr/lib/python3.8/linecache.py\", line 95, in updatecache
    
stat = os.stat(fullname)

FileNotFoundError
: 
[Errno 2] Нет такого файла или каталога: ':cashcode/ccnet.py'

During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File \"<string>\", line 1, in <module>
  File \"<frozen importlib._bootstrap>\", line 991, in _find_and_load
  File \"<frozen importlib._bootstrap>\", line 975, in _find_and_load_unlocked
  File \"<frozen importlib._bootstrap>\", line 655, in _load_unlocked
  File \"<frozen importlib._bootstrap>\", line 618, in _load_backward_compatible
  File \":cashcode/ccnet.py\", line 9, in <module>
  File \"<frozen importlib._bootstrap>\", line 991, in _find_and_load
  File \"<frozen importlib._bootstrap>\", line 975, in _find_and_load_unlocked
  File \"<frozen importlib._bootstrap>\", line 655, in _load_unlocked
  File \"<frozen importlib._bootstrap>\", line 618, in _load_backward_compatible
  File \"/home/eri/.local/lib/python3.8/site-packages/serial/__init__.py\", line 10, in <module>
    
from . import utilities, abc, model, marshal, errors, properties, meta, hooks, test, request

  File \"<frozen importlib._bootstrap>\", line 991, in _find_and_load
  File \"<frozen importlib._bootstrap>\", line 975, in _find_and_load_unlocked
  File \"<frozen importlib._bootstrap>\", line 655, in _load_unlocked
  File \"<frozen importlib._bootstrap>\", line 618, in _load_backward_compatible
  File \"/home/eri/.local/lib/python3.8/site-packages/serial/utilities/__init__.py\", line 5, in <module>
    
compatibility.backport()  # noqa

  File \"/home/eri/.local/lib/python3.8/site-packages/serial/utilities/compatibility.py\", line 21, in backport
    
frame_info = inspect.stack()[1]  # type: inspect.FrameInfo

  File \"/usr/lib/python3.8/inspect.py\", line 1514, in stack
    
return getouterframes(sys._getframe(1), context)

  File \"/usr/lib/python3.8/inspect.py\", line 1491, in getouterframes
    
frameinfo = (frame,) + getframeinfo(frame, context)

  File \"/usr/lib/python3.8/inspect.py\", line 1465, in getframeinfo
    
lines, lnum = findsource(frame)

  File \"/usr/lib/python3.8/inspect.py\", line 794, in findsource
    
lines = linecache.getlines(file, module.__dict__)

  File \"/usr/lib/python3.8/linecache.py\", line 47, in getlines
    
return updatecache(filename, module_globals)

  File \"/usr/lib/python3.8/linecache.py\", line 103, in updatecache
    
data = cache[filename][0]()

SystemError
: 
<built-in method get_source of PythonQtImport.PythonQtImporter object at 0x7fbdeac3ebb0> returned NULL without setting an error
"

[mrbean-bremen]

PythonQtImporter is not really supported, see also this comment. Specifically, get_source is not implemented.
I'm moving this to discussion, as this is unlikely to change.